Arnold Beckman
Arnold Beckman invented an apparatus for testing acidity - National Inventors Hall of Fame.
apparatus
for testing acidity
Photo Courtesy of The Archives, California Institute of Technology
Arnold
Beckman
Arnold Beckman
Arnold Beckman invented an apparatus for testing acidity - National Inventors Hall of Fame.
Arnold Beckman
Arnold Beckman invented an apparatus for testing acidity - National Inventors Hall of Fame.
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